(1992). Monitoring volcanoes: Techniques and strategies used by the staff of the Cascades Volcano Observatory, 1980 - 90. United States Gov. Print. Off.
Chicago-Zitierstil (17. Ausg.)Monitoring Volcanoes: Techniques and Strategies Used by the Staff of the Cascades Volcano Observatory, 1980 - 90. Washington: United States Gov. Print. Off, 1992.
MLA-Zitierstil (9. Ausg.)Monitoring Volcanoes: Techniques and Strategies Used by the Staff of the Cascades Volcano Observatory, 1980 - 90. United States Gov. Print. Off, 1992.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.